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1 | /* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */ |
2 | |
3 | /* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */ |
4 | |
5 | |
6 | #ifndef DRIVER_ATM_ZATM_H |
7 | #define DRIVER_ATM_ZATM_H |
8 | |
9 | #include <linux/skbuff.h> |
10 | #include <linux/atm.h> |
11 | #include <linux/atmdev.h> |
12 | #include <linux/sonet.h> |
13 | #include <linux/pci.h> |
14 | |
15 | |
16 | #define DEV_LABEL "zatm" |
17 | |
18 | #define MAX_AAL5_PDU 10240 /* allocate for AAL5 PDUs of this size */ |
19 | #define MAX_RX_SIZE_LD 14 /* ceil(log2((MAX_AAL5_PDU+47)/48)) */ |
20 | |
21 | #define LOW_MARK 12 /* start adding new buffers if less than 12 */ |
22 | #define HIGH_MARK 30 /* stop adding buffers after reaching 30 */ |
23 | #define OFF_CNG_THRES 5 /* threshold for offset changes */ |
24 | |
25 | #define RX_SIZE 2 /* RX lookup entry size (in bytes) */ |
26 | #define NR_POOLS 32 /* number of free buffer pointers */ |
27 | #define POOL_SIZE 8 /* buffer entry size (in bytes) */ |
28 | #define NR_SHAPERS 16 /* number of shapers */ |
29 | #define SHAPER_SIZE 4 /* shaper entry size (in bytes) */ |
30 | #define VC_SIZE 32 /* VC dsc (TX or RX) size (in bytes) */ |
31 | |
32 | #define RING_ENTRIES 32 /* ring entries (without back pointer) */ |
33 | #define RING_WORDS 4 /* ring element size */ |
34 | #define RING_SIZE (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS) |
35 | |
36 | #define NR_MBX 4 /* four mailboxes */ |
37 | #define MBX_RX_0 0 /* mailbox indices */ |
38 | #define MBX_RX_1 1 |
39 | #define MBX_TX_0 2 |
40 | #define MBX_TX_1 3 |
41 | |
42 | struct zatm_vcc { |
43 | /*-------------------------------- RX part */ |
44 | int rx_chan; /* RX channel, 0 if none */ |
45 | int pool; /* free buffer pool */ |
46 | /*-------------------------------- TX part */ |
47 | int tx_chan; /* TX channel, 0 if none */ |
48 | int shaper; /* shaper, <0 if none */ |
49 | struct sk_buff_head tx_queue; /* list of buffers in transit */ |
50 | wait_queue_head_t tx_wait; /* for close */ |
51 | u32 *ring; /* transmit ring */ |
52 | int ring_curr; /* current write position */ |
53 | int txing; /* number of transmits in progress */ |
54 | struct sk_buff_head backlog; /* list of buffers waiting for ring */ |
55 | }; |
56 | |
57 | struct zatm_dev { |
58 | /*-------------------------------- TX part */ |
59 | int tx_bw; /* remaining bandwidth */ |
60 | u32 free_shapers; /* bit set */ |
61 | int ubr; /* UBR shaper; -1 if none */ |
62 | int ubr_ref_cnt; /* number of VCs using UBR shaper */ |
63 | /*-------------------------------- RX part */ |
64 | int pool_ref[NR_POOLS]; /* free buffer pool usage counters */ |
65 | volatile struct sk_buff *last_free[NR_POOLS]; |
66 | /* last entry in respective pool */ |
67 | struct sk_buff_head pool[NR_POOLS];/* free buffer pools */ |
68 | struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */ |
69 | /*-------------------------------- maps */ |
70 | struct atm_vcc **tx_map; /* TX VCCs */ |
71 | struct atm_vcc **rx_map; /* RX VCCs */ |
72 | int chans; /* map size, must be 2^n */ |
73 | /*-------------------------------- mailboxes */ |
74 | unsigned long mbx_start[NR_MBX];/* start addresses */ |
75 | dma_addr_t mbx_dma[NR_MBX]; |
76 | u16 mbx_end[NR_MBX]; /* end offset (in bytes) */ |
77 | /*-------------------------------- other pointers */ |
78 | u32 pool_base; /* Free buffer pool dsc (word addr) */ |
79 | /*-------------------------------- ZATM links */ |
80 | struct atm_dev *more; /* other ZATM devices */ |
81 | /*-------------------------------- general information */ |
82 | int mem; /* RAM on board (in bytes) */ |
83 | int khz; /* timer clock */ |
84 | int copper; /* PHY type */ |
85 | unsigned char irq; /* IRQ */ |
86 | unsigned int base; /* IO base address */ |
87 | struct pci_dev *pci_dev; /* PCI stuff */ |
88 | spinlock_t lock; |
89 | }; |
90 | |
91 | |
92 | #define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data) |
93 | #define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data) |
94 | |
95 | |
96 | struct zatm_skb_prv { |
97 | struct atm_skb_data _; /* reserved */ |
98 | u32 *dsc; /* pointer to skb's descriptor */ |
99 | }; |
100 | |
101 | #define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc) |
102 | |
103 | #endif |
104 |
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